S71919 ACD/P4AQBCD
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71919 ACD/P4AQBCD Bearing Product Overview & Core Advantages
The S71919 ACD/P4AQBCD is a precision quadruplex matched bearing set designed for applications demanding exceptional rigidity and accuracy. This metric angular contact ball bearing features a heavy preload (Class D) and is configured in a Back-to-Back (QBC) arrangement, providing superior stability and moment load capacity. Its sealed design and phenolic cage make it suitable for high-speed operation up to 21,000 rpm, while its P4A tolerance class ensures high-precision performance in demanding industrial environments.
S71919 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
- S71919: Basic model number denoting a 95mm bore, 130mm OD, and 72mm width.
- ACD: Angular Contact design with a D (25°) contact angle.
- P4A: High-Precision Tolerance Class, specifying extremely tight dimensional and running accuracy.
- QBC: Quadruplex Back-to-Cack matched set arrangement.
- D: Denotes Heavy Preload for maximum system rigidity.
S71919 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back configuration creates a highly rigid bearing system capable of withstanding heavy combined loads (radial and axial) and significant moment loads. The heavy preload (Class D) eliminates internal clearance, ensuring precise shaft positioning and minimal deflection under load.
High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to the high limiting speed of 21,000 rpm. This, combined with grease lubrication, ensures reliable operation at high rotational velocities.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees exceptional running accuracy. The sealed design protects against contamination, and the use of chrome steel for rings and balls ensures high durability and a long service life.
S71919 ACD/P4AQBCD Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for the most demanding applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Precision Joints
- Aerospace Actuation Systems
